Electrical condenser



May 28, 1935. T. 1., LEE

ELECTRICAL CONDENSER Filed Jan. 2, 1930 Patented May 28, 1935 UNITED STATEfi rentv QFFWE North East Appliance Gorporation, Rochester, N. Y a corporation of New York Application January 2,

18 Claims.

This invention relates to condenser assemblies of the type in which strips of paper and of metal foil are interleaved, and rolled into cylindrical form, the roll being enclosed in a housing having terminals connected with the exposed edges of the foil at the ends of the roll.

The object of the invention is to provide a simple, inexpensive and reliable consig'uction for a condenser assembly of the type in question, and

particularly to improve the form and mounting of the connecting terminals and facilitate the introduction of wax, or other 'fiuid insulating material, for the purpose of impregnating and waterproofing the condenser.

To the foregoing ends, the invention consists in the construction hereinafter described, and illustrated in the accompanying drawing, as it is defined in the annexed claims.

In the drawing, Fig. 1 is a partly sectional side elevation of a condenser assembly embodying the present invention, and Fig. 2 is a section on the line 2-2 in Fig. 1, looking from left to right.

The invention is illustrated as embodied in a condenser assembly of the kind commonly used in connection with electrical ignition apparatus, and the drawing is on an enlarged scale. The condenser roll 5 is of ordinary construction, having exposed projecting edges 6 of metal foil at each end for engagement with the corresponding connecting members or terminals. The condenser is enclosed within a tubular drawn metal housing 1, which is provided with a lining 8 of paper or other. sheet insulating material.

One end of the housing is closed by a head of novel construction. This head comprises a disc 9 moulded of bakelite or other suitable insulating material, in which a cylindrical binding post I0 is inserted in the mouldingoperation. The periphery of the head is seated in a channel H 40 'at the end of the housing, and is fixed in place by flanging over the edge of the sheet metal. The metalgrips the head with suflicient force to secure the parts tightly together and afford a practically air-tight joint, but wax or other material may be used to seal the joint in addition.

The inner end of the binding post I0 supports a connector formed of sheet metal. This connector has a flat body 12, preferably in the form 50 of a square with rounded corners, and a marginal flange l3, whichis serrated to provide sharp teeth adapted efiectively to dig into the foil at the end of the condenser and make good electrical connection therewith. The non-circular form of the connector results in the engagement of its toothed 1939, Serial No. QlSJ lll (Cil- FIE-=41) flange with several of the cylindrical convolutions of foil, thus assuring good electrical connection between the parts. The connector is secured in place on the binding post by spinning or riveting over the inner end thereof, which 5 passes through a central perforation in the connector.

The opposite end of the condenser is connected with or grounded upon the closed end M of the housing, by means of a connector 15 similar to that just described, and this connector is secured in place by a rivet it.

It is desirable to impregnate the condenser and fill the housing with insulating wax after the parts have been assembled, in order to expel and exclude all moisture and as much air as possible, and for this purpose it is necessary to provide an opening of some sort into the housing. In accordance with the present invention this is conveniently done by making the rivet l6 hollow or in the form of an eyelet, as shown, the. opening through the rivet serving for the purpose in question. After the condenser assembly hasbeen impregnated and filled with wax the hole in the rivet may be plugged, and for this purpose a plug in the form of a scutcheon pin i! may be conveniently used.

It will be apparent that the assembling of the parts maybe very easily and quickly performed, since it is necessary only to drop the condenser roll into the housing, press the head in place, and then secure it by spinning or pressing the end flange of the housing into overhanging engagement with the head. In the course of this operation the necessary electrical connections are made without any attention on the part of the manufacturer.

The invention claimed is:

1. A condenser assembly comprising: a condenser of the rolled type, a tubular sheet-metal housing enclosing the condenser and having an integral closed end, a sheet-metal connector lying against said closed end and provided with projections engaging the end of the condenser, a hollow rivet connecting the connector with said end of the housing, and a plug driven into and closing the opening through said rivet.

2. A condenser assembly comprising: a condenser of the rolled type, a tubular sheet-metal housing extending the full length of and enclosing the condenser, an end closure for the housing, comprising a disc of molded insulating material means including a part of said housing for holding said disc in place, a binding-post molded into said disc, and a sheet-metal connector lying 55 against the disc and riveted to the inner end 02 the binding-post and having an axially extending toothed flange engaging the end of the condenser.

3. A condenser assembly comprising, a tubular housing with an integral closed end provided with an opening; a tubular body of windings of foil and insulating strips enclosed by the housing; a connector within said housing and between said condenser body and closed end of said housing, said connector having a toothed flange electrically connected to a foil; a conductor attached to said connector and passing through said opening and occupying a part thereof; additional means cooperating with said conductor for closing said opening; a cover for said housing; and a terminal on said cover connected with the other foil.

4. A condenser assembly comprising, a condenser of the rolled type; a tubular housing enclosing and extending throughout the length of said condenser and having an integral closed end provided with an aperture; a connector lying against said closed end and having a toothed flange connected with a condenser foil; a hollow conducting member attaching said connector to. said closed end; means cooperating with said conducting member for closing said aperture; a cover for the other end of said housing; and a terminal carried by said cover and connected with the other condenser foil.

5. In combination with a condenser and a hbusing therefor, said housing having an integral closed end provided with an aperture; a connector wholly within said housing engaging the condenser and lying against said closed end; means securing the connector in place on said closed end and extending to the exterior of said housing through said aperture, said securing means provided with an opening affording access to the interior of said housing to facilitate impregnation of said condenser; and a plug to close said opening in said securing means.

6. An electrical condenser comprising, in com-- bination; a tubular condenser body including windings of foil strips and insulating strips, the margins of the foil strips extending respectively beyond the margins of the insulating strips and being crushed to provide terminals; a tubular metallic case substantially enclosing said condenser body and having a closed-end provided with an opening; means to close said opening, a connector clamped between the means and closed end of the case and having means projecting into the adjacent crushed foil margin; a nonconducting cover for the other end of the case; means provided solely by the case for holding said cover in place; a metal terminal supported by. the cover and having a part extending within the case; and a connector attached to said part of the terminal lying against the cover and projecting into the adjacent crushed foil margin.

7. An electrical condenser comprising, in combination; a tubular condenser body including windings of foil strips and insulating strips; a tubular metallic case surrounding said body and having a closed end; means for electrically connecting one of the foils to the case; a subassembly for closing the other end of the case comprising a nonconducting cover, and a metal terminal; a flange provided by the case and deformed against the cover to hold said cover in place; said metal terminal having a part extending within said case; and a connector lying against the cover to engage said part of the terminal and having a serrated flange connected with the other'ioil. 1

8. A condenser comprising, in combination, a subassembly of condenser material, comprising foil strips and insulating strips, an open ended tubular case enclosing said subassembly, a second subassembly secured in the open end of the case comprising, a nonconducting cover and a metal member extending from the exterior through the cover and attached thereto, means for electrically connecting an interior portion of said metal member with a condenser foil, means provided by the case for securing the second subassembly thereto and for maintaining the electrical connection of the metal member with said foil, and means for connecting the other foil with the case.

9. A condenser comprising, in combination, a body of condenser material providing a first subassembly and comprising foil strips and insulating strips, an open ended case enclosing the said first subassembly, a second subassembly comprising a nonconducting cover for the case, a metal member extending from the exterior through the cover and attached thereto, and means for connecting an interior portion of said metal member with a condenser foil, means provided by the case for securing the said second subassembly thereto and for -maintaining the electrical connection of the metal member with said foil, and means for connecting the other foil with the case.

10. A condenser comprising, in combination, a condenser subassembly comprising a cylindrical body of condenser material including foil strips and insulating strips, a tubular case enclosing the condenser subassembly, a closure subassem bly secured in the open end of the case comprising a nonconducting cover and a metal member extending from the exterior through the cover and attached thereto, means for connecting an interior portion of said metal member with a condenser foil, means provided by the case for securing the closure subassembly in the open end of the case, and for maintaining the electrical connection of the metal member with said foil, and means for connecting the other foil with the case.

11. A condenser comprising, in combination, a condenser subassembly comprising a cylindrical body of condenser material including foil strips and insulating strips, a tubular case having one closed end enclosing thelcondenser subassembly, a closure subassembly secured in the open end of the case comprising a nonconducting cover, a metal member extending from the exterior through the cover and attached thereto, and means for connecting an interior portion of said metal member with a condenser foil, means provided by the case for securing the closure subassembly in the open .end of the case, said closure subassembly when so secured, pressing against the connecting means for electrically engaging one foil oi the condenser subassembly, and adapted to, press the condenser subassembly against the closed end of the case, and means for connectingthe other foil with the case.

12. A condenser comprising, in combination, a condenser subassembly comprising a cylindrical body of condenser material including foil strips and insulating strips, a case subassembly for enclosing the condenser subassembly comprising an open ended tube havinga closed end, and a connegtor carried by its closed end, a closure subassembly secured in the open end of the case sub assembly comprising a nonconducting head member, a metal member extending through the head member and secured thereto, and a connector carried by said metal member adapted to be connected with a condenser foil, means provided by the case subassembly for securing the closure subassembly thereto and for causing both of the connectors to electrically engage one each of the foil strips.

13. A condenser comprising in combination, a condenser subassembly including foil strips and insulation strips arranged to provide exposed portions of each foil, a case subassembly comprising a tubular member with one closed end and a foil connector carried by said member, a closure subassembly adapted to fit within the open end of the case subassembly and comprising a head member, a binding post extending through said head member and a connector attached to the inner end of said post and disposed against the head member, means including a part of the tubular member for securing the closure subassembly thereto, said closure subassembly making electrical engagement with a foil of said condenser subassembly by pressing against the second mentioned connector, and pressing the said condenser subassembly into electrical engagement with said first mentioned connector.

14. A condenser, comprising in combination, a subassembly comprising a body of condenser material including foil strips and insulation strips, a tubular member for enclosing said condenser body and having a closed end, a connector 10- catedadjacent the closed end for grounding one of said foils to the tubular member, a subassembly for closing the tubular member comprising, a non-conducting head member, and a metal member extending from the exterior through the cover to terminate within the open end of the tubular member and attached to the head member, means held against the head member for electrically connecting the terminating portion of said metal member with the other of said foils, and means provided by the tubular member for securing the second subassembly to the first subassembly, said second subassembly when secured within the tubular member pressing the condenser subassembly against the first mentioned connector.

15. A condenser comprising in combination, a subassembly comprising a body of condenser material including foil strips and insulation strips, an open ended tubular member provided with one closed end for enclosing said condenser body, and a connector located adjacent the closed end of the tubular member for connecting. the tubular member to one of the foils, a subassembly for closing the open end of the tubular member comprising, a non-conducting head member, and a metal member extending from the exterior-through the head member and attached thereto, means for electrically connecting said metal member to another of said foils including a plate adjacent the head member and extending into the open end of said tubular member and means including a part of said tubular member for securing the second subassembly within the same so that the condenser foil will be pressed against the connector and so that the plate will be pressed against the condenser body.

16. A condenser comprising in combination, a subassembly comprising a body of condenser material including foil strips and insulator strips having exposed portions, an open ended tubular member with a closed end for enclosing said condenser body, a connector for grounding one of said foils to the tubular member located adjacent the closed end thereof, a subassembly for the open end of the tubular member comprising a nonconducting head member, and a metal member extending from the exterior through the cover and attached thereto, means for electrically connecting an interior portion of said metal member with one of said foils and including a plate adjacent the head member and within the open end of said tubular member, and means provided by the tubular member for securing the second subassembly to the first subassembly, and for pressing both the connector and plate each into electrical communication with one of said condenser foils.

17. A condenser comprising in combination, an open ended tubular case, said case having one integrally formed closed end, a connector located adjacent the closed end of said case, a subassembly enclosed by said case comprising a body of condenser material including 'foil strips and insulation strips, one of said foil strips having exposed portions at the closed end of the case,

a subassembly for the open end of the case comprising a nonconducting head member, and a metal member extending through the head member and attached thereto, means for electrically connecting the interior portion of said metal member with a condenser foil, and means provided by the case for securing the second mentioned subassembly to the case so that the head member presses against the electrically connecting means for pressing the exposed foil portions against the said connector.

' 18. A condenser comprising in combination, an open ended cup-like tubular case, a subassembly enclosed by said case comprising a body of condenser material including foil strips and insulation strips, a connector located against the closed end of said case for grounding one of said foil strips to the case, a'subassembly for the open end of the case comprising, a nonconducting head member, and a metal member extending through the head member and attached thereto, means for electrically connecting the interior portion of said metal member with another of said foil strips, the interior portion of said metal member terminating between the head member and the body of condenser material, and means provided by the case for securing the second mentioned subassembly to the case and for pressing the first mentioned subassembly against the closed end of the case by pressing the head member and the electrically connecting means against the condenser body.

THOMAS L. LEE. 

